Omar Suleiman Al-Barwari, S., and L. Hassan Omar. “Deriving Water Valley Networks from Digital Elevation Models SRTM by Using Geographic Information Systems : Khabur River Basin on the Iraqi Side As a Model”. Adab Al-Rafidayn, vol. 51, no. 87.1, Dec. 2021, pp. 714-38, doi:10.33899/radab.2021.170448.